单项选择题

A．It is extremely dangerous to fly in the dark.
B．Noise regulations restrict the hours of airport operation.
C．Some of its runways are not in good condition.
D．Cargo planes produce more disturbing noises at night.
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单项选择题
A．In an office.B．In a restaurant.C．In a department store.D．In a factory.
A．In an office.
B．In a restaurant.
C．In a department store.
D．In a factory.
单项选择题
A．Guess its meaning.B．Ask somebody.C．Refer to a dictionary.D．Add it to your word list.
A．Guess its meaning.
B．Ask somebody.
C．Refer to a dictionary.
D．Add it to your word list.
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